APA-ийн эшлэл(7 дахь хэвлэлт)

Christianson, S. (2010). Freeing Charles: The struggle to free a slave on the eve of the Civil War. University of Illinois Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Christianson, Scott. Freeing Charles: The Struggle to Free a Slave on the Eve of the Civil War. Urbana: University of Illinois Press, 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Christianson, Scott. Freeing Charles: The Struggle to Free a Slave on the Eve of the Civil War. University of Illinois Press, 2010.